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Measurement


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Download CSV Daily N2O AC0213 Devon 2012.csv 0.05MB


Measurement Data Component

Title: Daily nitrous oxide flux measurements: AC0213, Devon, 2012
Related Party - Organisation (Author): Rothamsted Research - North Wyke
Related Party - Organisation (Funder): Defra
Abstract:
At a grassland site near Rothamsted Research, North Wyke in south-west England (sandy clay loam topsoil texture) small field plots (10 x 3 m) were arranged in a randomised block design with three replicates per treatment. Cattle urine (at 5 L m-2) was applied to grassland in mid-March and in early September 2012. A control treatment was included where no urine was applied. In separate treatments, two commercially available nitrification inhibitors were tested; dicyandiamide (DCD) and an additive containing two pyrazole derivatives (1H-1,2,4-triazole and 3-methylpyrazole) were pre-mixed with the urine prior to application to give application rates of 15 kg/ha and 5 L/ha for the DCD and the pyrazole derivatives, respectively. The urine was collected from lactating dairy cows at Reading University, kept refrigerated at <4°C and applied within two days of collection. Following urine application to five 0.36 m2 areas of the plot, measurements of direct nitrous oxide (N2O) emissions were made over c.12 months, using 5 static chambers each 0.4 x 0.4 m (1 per 0.36 m2 area, giving a total measured surface area of 0.8 m2) and analysed by gas chromatography. This dataset is of daily nitrous oxide flux (g N2O-N/ha/d) measurements. Pyrazole derivative = an additive containing two pyrazole derivatives (1H-1,2,4-triazole and 3-methylpyrazole). ND = not determined. If the data file is downloaded/opened in excel, dates may appear as dd-mm-yy instead of the standard yy-mm-dd.
Subject Keywords: Nitrous oxideUrineNitrification inhibitorsGrassland soils
Geographic Keywords: Devon
Observed Properties: DateExperimental blockingExperimental treatmentLocationsNitrous oxide mass fluxYear
Parameter: Block number
Parameter: Daily nitrous oxide emission
Parameter: Measurement date
Parameter: Site location
Parameter: Treatment
Parameter: Year experiment started

Geographic Extent -
    Longitude (West): -4.03
    Longitude (East): -3.76
    Latitude (South): 50.72
    Latitude (North): 50.89

Phenomenon Time -  Start Date/Time: 2012-03-16 End Date/Time:  2013-10-01
Result Time: 2013-10-01
Valid Time -  Start Date/Time: 2012-03-16 End Date/Time:  2013-10-01
Feature of Interest: biosphere
Publication Date: 2017-02-03

This data is made available under the terms of the Open Government Licence (Version 3).

Total file downloads: 4

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